Hello, syzbot found the following issue on: HEAD commit: 0d3eb744aed4 Merge tag 'urgent-rcu.2023.04.07a' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1662e1c3c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=759d5e665e47a55 dashboard link: https://syzkaller.appspot.com/bug?extid=f687659f3c2acfa34201 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0b9db4c3a583/disk-0d3eb744.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/462736705e85/vmlinux-0d3eb744.xz kernel image: https://storage.googleapis.com/syzbot-assets/8932ee360b94/bzImage-0d3eb744.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f687659f3c2acfa34201@xxxxxxxxxxxxxxxxxxxxxxxxx loop2: detected capacity change from 0 to 1024 hfsplus: request for non-existent node 64 in B*Tree hfsplus: request for non-existent node 64 in B*Tree ================================================================== BUG: KASAN: wild-memory-access in memcpy_from_page include/linux/highmem.h:391 [inline] BUG: KASAN: wild-memory-access in hfsplus_bnode_read fs/hfsplus/bnode.c:32 [inline] BUG: KASAN: wild-memory-access in hfsplus_bnode_read_u16 fs/hfsplus/bnode.c:45 [inline] BUG: KASAN: wild-memory-access in hfsplus_bnode_dump+0x403/0xba0 fs/hfsplus/bnode.c:305 Read of size 2 at addr 000508800000103e by task syz-executor.2/9009 CPU: 0 PID: 9009 Comm: syz-executor.2 Not tainted 6.3.0-rc6-syzkaller-00016-g0d3eb744aed4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_report+0xe6/0x540 mm/kasan/report.c:433 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 kasan_check_range+0x283/0x290 mm/kasan/generic.c:187 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 memcpy_from_page include/linux/highmem.h:391 [inline] hfsplus_bnode_read fs/hfsplus/bnode.c:32 [inline] hfsplus_bnode_read_u16 fs/hfsplus/bnode.c:45 [inline] hfsplus_bnode_dump+0x403/0xba0 fs/hfsplus/bnode.c:305 hfsplus_brec_remove+0x42c/0x4f0 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x275/0x450 fs/hfsplus/attributes.c:299 hfsplus_delete_all_attrs+0x26b/0x3c0 fs/hfsplus/attributes.c:378 hfsplus_delete_cat+0xb87/0xfc0 fs/hfsplus/catalog.c:425 hfsplus_unlink+0x363/0x7f0 fs/hfsplus/dir.c:385 vfs_unlink+0x35d/0x5f0 fs/namei.c:4250 do_unlinkat+0x4a1/0x940 fs/namei.c:4316 __do_sys_unlink fs/namei.c:4364 [inline] __se_sys_unlink fs/namei.c:4362 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4362 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f603de8c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f603eb66168 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f603dfabf80 RCX: 00007f603de8c169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f603dee7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff75f7975f R14: 00007f603eb66300 R15: 0000000000022000 </TASK> ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
